This work addresses the treatment of a complex industrial effluent containing high concentrations metals and spiked with two organic solvents (diethylketone – DEK, methyl ethyl ketone - MEK) using an eco-friendly approach. The system herein proposed consists bio-barrier that combines adsorption capacity sepiolite properties Streptococcus equisimilis biofilm proven ability in degradation bioremo...

Recent protest movements brought attention to the one percent, a segment of the population that is critical to understanding inequality and social mobility but that attracts relatively little research attention. In this article, I survey current research on the one percent in the United States. I distinguish income from wealth and show that both are very concentrated but that the concentration ...

From 1995 to 1998, more than 90 percent of mid-range IPOs were charged underwriter fees, or spreads, of exactly seven percent, even though evidence suggests that economies of scale in the size of the offering should allow for lower fees. Chen and Ritter (2000) offer collusion as a possible explanation based on empirical analysis and observation. Alternatively, we investigate whether the spreads...